[ECOS] Re: spi driver on at91

davarn@free.fr davarn@free.fr
Thu Aug 19 14:55:00 GMT 2004


Hello,
I'm interested in merging all this work and give to ecos a /dev/spi type of
I already started to write cdl to give to this driver, flexibility.
I plan first to write only a spi master driver.

David Arnaud

Selon Savin Zlobec <savin@elatec.si>:

> davarn wrote:
>
> >Hello,
> >I'm really interested to see your code, perhaps it wiil be a good starting
> >point, or perhaps just need a simple port to at91m42800.
> >What i want to do is "/dev/spi" type of driver wich can handle all type of
> AT91
> >board.
> >After make a dataFlash and ADC driver on it.
> >
> >Regards
> >David
> >
> >Selon Mike Jastrebtsoff <jam2000@pisem.net>:
> >
> >> Hello,
> >>
> >> I've ported SPI driver form arm-linux to ecos(AT91M55800A) not so long
> ago.
> >> I used it with Dataflash memory.
> >>
> >> It has some issues:
> >> 1. The speed rate doesn't rise beyond 320 Kbit.
> >>    I've applied to the Atmel's support but didn't get a satisfactory
> answer.
> >> 2. Sometimes the spi device doesn't answer the command.
> >>
> >> Probably these are peculiarities of AT91 SPI or my bugs.
> >> I could send it to you.
> >>
> >> By the way there is Atmel's  software SPI driver.
> >>
> >> -------
> >> Regards,
> >>   Mike
> >>
> >> dff> I am currently starting the devellopement of an spi driver on at91.
> >> dff> Does anobody have done that already or is currently doing?
> >> dff> If someone do this driver let me know to not devellop this twice.
> >
> >
>
> Hi,
>
> I've also started writing an spi driver some time ago,  did an io_spi
> device driver and
> its low level part for the at91. I managed to do some tests with its
> local loopback feature,
> the next thing in plan is to write an dataFlash driver...
>
> I can share my code and maybe eCos needs an spi device driver
> infrastructure.
> Anybody interested in merging our work ?
>
> savin
>



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